L-Cysteine is an amino acid found in most high protein foods. It has a role in maintaining the immune system & also acts as an antioxidant for protection of the liver, lungs & brain. The ability of L-Cysteine is to promote metabolism of fats & production of muscle tissue; this may aid in weight control & a lean, toned body. The addition of Vitamin B6 enhances metabolism, & helps speed up absorption & assimilation of L-Cysteine in the body. This makes it one of the most effective ways of taking Health Aid L-Cysteine.